AllegroCache is a persistent database that stores definitions and
instances of Lisp classes. It supports a full transaction model with
long and short transactions, and meets the classic ACID requirements
for a reliable and robust database. AllegroCache has been part of
Allegro CL for several years. This Webinar will provide an
introduction to the product, with several worked out examples, and
discuss issues such as database operations including committing and
rollback, using AllegroCache in a multithreaded environment including
using it with web servers, backup and recovery, updating to new
versions, and where database operations diverge from normal Lisp
programming.

Initially Semantic Web databases were primarily used for
analytics. Users would dump data in their RDF database and then
perform interesting analytics with rules, reasoners, and query
languages like SPARQL. Nowadays enterprises are starting to consider
NoSQL database options such as RDF in their primary processes and they
are rightfully worried about transactionality, recoverability,
automatic backup, replication, automatic failover, concurrency, and
more. Even more important, for many applications they need a steady
stream of intermixed additions, updates, deletes and queries. This
seminar will cover strategies to manage these issues, some discussion
around NoSQL - RDF, and conclude with a proposal for measuring the
dynamism of RDF databases.